W happy she was.
My students (Friday night Knitting 101 class) all did better with Clover Takumi bamboo needles. One of the students had learned to knit a hundred years ago, but her tension and control of her stitches was always her bane, downfall...and led her to give up. (she had learned to knit way back then with 14" metal straight needles, btw)
This time 'round, she was using Clover bamboo needles because that was on my Class Materials list. I specifically recommended wood or bamboo.
Her tension and stitch control was PERFECTION, and I can't tell you how happy she was!
If possible, I recommend that you change to bamboo needles. They are very inexpensive, and available at local craft stores, or even Amazon! Clover brand is good, as well as the KP brand.
I don't think the problem is your inexpensive yarn. I think it's totally the metal needles causing the disharmony.
I applaud you for being able to 'self-teach' using our videos for the long-tail cast on! That shows that you have a great natural ability to learn knitting! Don't give up on yourself! I have high hopes for you! :yay: